121450151540 has 24 divisors (see below), whose sum is σ = 263839985640. Its totient is φ = 46904885888.

The previous prime is 121450151521. The next prime is 121450151561. The reversal of 121450151540 is 45151054121.

It can be written as a sum of positive squares in 4 ways, for example, as 48080356 + 121402071184 = 6934^2 + 348428^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104697827 + ... + 104698986.

It is an arithmetic number, because the mean of its divisors is an integer number (10993332735).

Almost surely, 2^121450151540 is an apocalyptic number.

121450151540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121450151540 is an abundant number, since it is smaller than the sum of its proper divisors (142389834100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121450151540 is a wasteful number, since it uses less digits than its factorization.

121450151540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209396851 (or 209396849 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

The spelling of 121450151540 in words is "one hundred twenty-one billion, four hundred fifty million, one hundred fifty-one thousand, five hundred forty".